/Engine/Source/Editor/StaticMeshEditor/Public/StaticMeshEditorSubsystem.h
Same as SetConvexDecompositionCollisionsWithNotification but changes are automatically applied.
bool BulkSetConvexDecompositionCollisions ( const [TArray](API\Runtime\Core\Containers\TArray)< [UStaticMesh](API\Runtime\Engine\Engine\UStaticMesh) * > & StaticMeshes, int32 HullCount, int32 MaxHullVerts, int32 HullPrecision )